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337 lines
14 KiB
C
337 lines
14 KiB
C
/******************************************************************************
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* In order to make life a little bit easier when using the GIF file format,
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* this library was written, and which does all the dirty work...
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*
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* Written by Gershon Elber, Jun. 1989
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* Hacks by Eric S. Raymond, Sep. 1992
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******************************************************************************
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* History:
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* 14 Jun 89 - Version 1.0 by Gershon Elber.
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* 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names)
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* 15 Sep 90 - Version 2.0 by Eric S. Raymond (Changes to suoport GIF slurp)
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* 26 Jun 96 - Version 3.0 by Eric S. Raymond (Full GIF89 support)
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* 17 Dec 98 - Version 4.0 by Toshio Kuratomi (Fix extension writing code)
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*****************************************************************************/
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#ifndef _GIF_LIB_H_
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#define _GIF_LIB_H_ 1
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define GIF_LIB_VERSION " Version 4.1, "
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#define GIF_ERROR 0
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#define GIF_OK 1
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#ifndef TRUE
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#define TRUE 1
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#endif /* TRUE */
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#ifndef FALSE
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#define FALSE 0
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#endif /* FALSE */
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#ifndef NULL
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#define NULL 0
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#endif /* NULL */
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#define GIF_STAMP "GIFVER" /* First chars in file - GIF stamp. */
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#define GIF_STAMP_LEN sizeof(GIF_STAMP) - 1
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#define GIF_VERSION_POS 3 /* Version first character in stamp. */
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#define GIF87_STAMP "GIF87a" /* First chars in file - GIF stamp. */
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#define GIF89_STAMP "GIF89a" /* First chars in file - GIF stamp. */
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#define GIF_FILE_BUFFER_SIZE 16384 /* Files uses bigger buffers than usual. */
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typedef int GifBooleanType;
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typedef unsigned char GifPixelType;
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typedef unsigned char *GifRowType;
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typedef unsigned char GifByteType;
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#ifdef _GBA_OPTMEM
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typedef unsigned short GifPrefixType;
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typedef short GifWord;
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#else
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typedef unsigned int GifPrefixType;
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typedef int GifWord;
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#endif
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#define GIF_MESSAGE(Msg) fprintf(stderr, "\n%s: %s\n", PROGRAM_NAME, Msg)
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#define GIF_EXIT(Msg) { GIF_MESSAGE(Msg); exit(-3); }
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#ifdef SYSV
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#define VoidPtr char *
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#else
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#define VoidPtr void *
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#endif /* SYSV */
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typedef struct GifColorType {
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GifByteType Red, Green, Blue;
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} GifColorType;
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typedef struct ColorMapObject {
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int ColorCount;
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int BitsPerPixel;
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GifColorType *Colors; /* on malloc(3) heap */
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} ColorMapObject;
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typedef struct GifImageDesc {
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GifWord Left, Top, Width, Height, /* Current image dimensions. */
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Interlace; /* Sequential/Interlaced lines. */
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ColorMapObject *ColorMap; /* The local color map */
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} GifImageDesc;
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typedef struct GifFileType {
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GifWord SWidth, SHeight, /* Screen dimensions. */
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SColorResolution, /* How many colors can we generate? */
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SBackGroundColor; /* I hope you understand this one... */
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ColorMapObject *SColorMap; /* NULL if not exists. */
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int ImageCount; /* Number of current image */
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GifImageDesc Image; /* Block describing current image */
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struct SavedImage *SavedImages; /* Use this to accumulate file state */
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VoidPtr UserData; /* hook to attach user data (TVT) */
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VoidPtr Private; /* Don't mess with this! */
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} GifFileType;
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typedef enum {
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UNDEFINED_RECORD_TYPE,
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SCREEN_DESC_RECORD_TYPE,
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IMAGE_DESC_RECORD_TYPE, /* Begin with ',' */
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EXTENSION_RECORD_TYPE, /* Begin with '!' */
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TERMINATE_RECORD_TYPE /* Begin with ';' */
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} GifRecordType;
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/* DumpScreen2Gif routine constants identify type of window/screen to dump.
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* Note all values below 1000 are reserved for the IBMPC different display
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* devices (it has many!) and are compatible with the numbering TC2.0
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* (Turbo C 2.0 compiler for IBM PC) gives to these devices.
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*/
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typedef enum {
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GIF_DUMP_SGI_WINDOW = 1000,
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GIF_DUMP_X_WINDOW = 1001
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} GifScreenDumpType;
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/* func type to read gif data from arbitrary sources (TVT) */
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typedef int (*InputFunc) (GifFileType *, GifByteType *, int);
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/* func type to write gif data ro arbitrary targets.
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* Returns count of bytes written. (MRB)
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*/
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typedef int (*OutputFunc) (GifFileType *, const GifByteType *, int);
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/******************************************************************************
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* GIF89 extension function codes
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******************************************************************************/
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#define COMMENT_EXT_FUNC_CODE 0xfe /* comment */
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#define GRAPHICS_EXT_FUNC_CODE 0xf9 /* graphics control */
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#define PLAINTEXT_EXT_FUNC_CODE 0x01 /* plaintext */
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#define APPLICATION_EXT_FUNC_CODE 0xff /* application block */
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/******************************************************************************
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* O.K., here are the routines one can access in order to encode GIF file:
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* (GIF_LIB file EGIF_LIB.C).
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******************************************************************************/
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GifFileType *EGifOpenFileName(const char *GifFileName,
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int GifTestExistance);
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GifFileType *EGifOpenFileHandle(int GifFileHandle);
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GifFileType *EGifOpen(void *userPtr, OutputFunc writeFunc);
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int EGifSpew(GifFileType * GifFile);
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void EGifSetGifVersion(const char *Version);
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int EGifPutScreenDesc(GifFileType * GifFile,
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int GifWidth, int GifHeight, int GifColorRes,
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int GifBackGround,
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const ColorMapObject * GifColorMap);
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int EGifPutImageDesc(GifFileType * GifFile, int GifLeft, int GifTop,
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int Width, int GifHeight, int GifInterlace,
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const ColorMapObject * GifColorMap);
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int EGifPutLine(GifFileType * GifFile, GifPixelType * GifLine,
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int GifLineLen);
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int EGifPutPixel(GifFileType * GifFile, GifPixelType GifPixel);
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int EGifPutComment(GifFileType * GifFile, const char *GifComment);
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int EGifPutExtensionFirst(GifFileType * GifFile, int GifExtCode,
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int GifExtLen, const VoidPtr GifExtension);
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int EGifPutExtensionNext(GifFileType * GifFile, int GifExtCode,
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int GifExtLen, const VoidPtr GifExtension);
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int EGifPutExtensionLast(GifFileType * GifFile, int GifExtCode,
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int GifExtLen, const VoidPtr GifExtension);
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int EGifPutExtension(GifFileType * GifFile, int GifExtCode, int GifExtLen,
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const VoidPtr GifExtension);
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int EGifPutCode(GifFileType * GifFile, int GifCodeSize,
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const GifByteType * GifCodeBlock);
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int EGifPutCodeNext(GifFileType * GifFile,
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const GifByteType * GifCodeBlock);
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int EGifCloseFile(GifFileType * GifFile);
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#define E_GIF_ERR_OPEN_FAILED 1 /* And EGif possible errors. */
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#define E_GIF_ERR_WRITE_FAILED 2
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#define E_GIF_ERR_HAS_SCRN_DSCR 3
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#define E_GIF_ERR_HAS_IMAG_DSCR 4
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#define E_GIF_ERR_NO_COLOR_MAP 5
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#define E_GIF_ERR_DATA_TOO_BIG 6
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#define E_GIF_ERR_NOT_ENOUGH_MEM 7
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#define E_GIF_ERR_DISK_IS_FULL 8
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#define E_GIF_ERR_CLOSE_FAILED 9
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#define E_GIF_ERR_NOT_WRITEABLE 10
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/******************************************************************************
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* O.K., here are the routines one can access in order to decode GIF file:
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* (GIF_LIB file DGIF_LIB.C).
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*****************************************************************************/
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#ifndef _GBA_NO_FILEIO
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GifFileType *DGifOpenFileName(const char *GifFileName);
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GifFileType *DGifOpenFileHandle(int GifFileHandle);
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int DGifSlurp(GifFileType * GifFile);
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#endif /* _GBA_NO_FILEIO */
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GifFileType *DGifOpen(void *userPtr, InputFunc readFunc); /* new one
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* (TVT) */
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int DGifGetScreenDesc(GifFileType * GifFile);
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int DGifGetRecordType(GifFileType * GifFile, GifRecordType * GifType);
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int DGifGetImageDesc(GifFileType * GifFile);
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int DGifGetLine(GifFileType * GifFile, GifPixelType * GifLine, int GifLineLen);
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int DGifGetPixel(GifFileType * GifFile, GifPixelType GifPixel);
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int DGifGetComment(GifFileType * GifFile, char *GifComment);
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int DGifGetExtension(GifFileType * GifFile, int *GifExtCode,
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GifByteType ** GifExtension);
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int DGifGetExtensionNext(GifFileType * GifFile, GifByteType ** GifExtension);
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int DGifGetCode(GifFileType * GifFile, int *GifCodeSize,
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GifByteType ** GifCodeBlock);
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int DGifGetCodeNext(GifFileType * GifFile, GifByteType ** GifCodeBlock);
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int DGifGetLZCodes(GifFileType * GifFile, int *GifCode);
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int DGifCloseFile(GifFileType * GifFile);
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#define D_GIF_ERR_OPEN_FAILED 101 /* And DGif possible errors. */
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#define D_GIF_ERR_READ_FAILED 102
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#define D_GIF_ERR_NOT_GIF_FILE 103
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#define D_GIF_ERR_NO_SCRN_DSCR 104
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#define D_GIF_ERR_NO_IMAG_DSCR 105
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#define D_GIF_ERR_NO_COLOR_MAP 106
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#define D_GIF_ERR_WRONG_RECORD 107
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#define D_GIF_ERR_DATA_TOO_BIG 108
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#define D_GIF_ERR_NOT_ENOUGH_MEM 109
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#define D_GIF_ERR_CLOSE_FAILED 110
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#define D_GIF_ERR_NOT_READABLE 111
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#define D_GIF_ERR_IMAGE_DEFECT 112
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#define D_GIF_ERR_EOF_TOO_SOON 113
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/******************************************************************************
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* O.K., here are the routines from GIF_LIB file QUANTIZE.C.
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******************************************************************************/
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int QuantizeBuffer(unsigned int Width, unsigned int Height,
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int *ColorMapSize, GifByteType * RedInput,
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GifByteType * GreenInput, GifByteType * BlueInput,
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GifByteType * OutputBuffer,
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GifColorType * OutputColorMap);
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/******************************************************************************
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* O.K., here are the routines from GIF_LIB file QPRINTF.C.
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******************************************************************************/
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extern int GifQuietPrint;
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#ifdef HAVE_STDARG_H
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extern void GifQprintf(char *Format, ...);
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#elif defined (HAVE_VARARGS_H)
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extern void GifQprintf();
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#endif /* HAVE_STDARG_H */
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/******************************************************************************
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* O.K., here are the routines from GIF_LIB file GIF_ERR.C.
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******************************************************************************/
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#ifndef _GBA_NO_FILEIO
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extern void PrintGifError(void);
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#endif /* _GBA_NO_FILEIO */
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extern int GifLastError(void);
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/******************************************************************************
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* O.K., here are the routines from GIF_LIB file DEV2GIF.C.
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******************************************************************************/
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extern int DumpScreen2Gif(const char *FileName,
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int ReqGraphDriver,
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long ReqGraphMode1,
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long ReqGraphMode2,
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long ReqGraphMode3);
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/*****************************************************************************
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*
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* Everything below this point is new after version 1.2, supporting `slurp
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* mode' for doing I/O in two big belts with all the image-bashing in core.
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*
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*****************************************************************************/
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/******************************************************************************
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* Color Map handling from ALLOCGIF.C
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*****************************************************************************/
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extern ColorMapObject *MakeMapObject(int ColorCount,
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const GifColorType * ColorMap);
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extern void FreeMapObject(ColorMapObject * Object);
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extern ColorMapObject *UnionColorMap(const ColorMapObject * ColorIn1,
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const ColorMapObject * ColorIn2,
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GifPixelType ColorTransIn2[]);
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extern int BitSize(int n);
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/******************************************************************************
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* Support for the in-core structures allocation (slurp mode).
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*****************************************************************************/
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/* This is the in-core version of an extension record */
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typedef struct {
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int ByteCount;
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char *Bytes; /* on malloc(3) heap */
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int Function; /* Holds the type of the Extension block. */
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} ExtensionBlock;
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/* This holds an image header, its unpacked raster bits, and extensions */
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typedef struct SavedImage {
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GifImageDesc ImageDesc;
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unsigned char *RasterBits; /* on malloc(3) heap */
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int Function; /* DEPRECATED: Use ExtensionBlocks[x].Function instead */
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int ExtensionBlockCount;
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ExtensionBlock *ExtensionBlocks; /* on malloc(3) heap */
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} SavedImage;
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extern void ApplyTranslation(SavedImage * Image, GifPixelType Translation[]);
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extern void MakeExtension(SavedImage * New, int Function);
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extern int AddExtensionBlock(SavedImage * New, int Len,
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unsigned char ExtData[]);
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extern void FreeExtension(SavedImage * Image);
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extern SavedImage *MakeSavedImage(GifFileType * GifFile,
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const SavedImage * CopyFrom);
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extern void FreeSavedImages(GifFileType * GifFile);
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/******************************************************************************
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* The library's internal utility font
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*****************************************************************************/
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#define GIF_FONT_WIDTH 8
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#define GIF_FONT_HEIGHT 8
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extern unsigned char AsciiTable[][GIF_FONT_WIDTH];
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#ifdef _WIN32
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extern void DrawGifText(SavedImage * Image,
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#else
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extern void DrawText(SavedImage * Image,
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#endif
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const int x, const int y,
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const char *legend, const int color);
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extern void DrawBox(SavedImage * Image,
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const int x, const int y,
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const int w, const int d, const int color);
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void DrawRectangle(SavedImage * Image,
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const int x, const int y,
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const int w, const int d, const int color);
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extern void DrawBoxedText(SavedImage * Image,
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const int x, const int y,
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const char *legend,
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const int border, const int bg, const int fg);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* _GIF_LIB_H */
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